5.7 Nested Loops

5.7 Nested Loops

A nested loop where a loop is placed inside of another loop. The "inner loop" will be executed for very single iteration of the "outer loop".

Common Example

let activities = [ ['Work', 9], ['Eat', 1], ['Commute', 2], ['Play Game', 1], ['Sleep', 7] ]; for (let i = 0; i < 5; i++) { for (let j = 0; j < 5; j++) { console.log(activities[i][j]); } } /* Output: Work 9 Eat 1 Commute 2 Play Game 1 Sleep 7 */
Here the nested loop iterates through all the values in the 2D array. Then all the values are printed out to the console.
It is typical to use a nested loop to iterate through a 2D array.


You can add practice problems here if you want. Follow the format below.

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5.6 2D Arrays
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